Sensitivity Tables (AO: NGS and LGS)

Notes

The sensitivity tables assume photometric conditions (50%-ile cloud cover), grey time (80%-ile sky background) and an airmass of less than 1.2. Note however that the OH sky emission can vary by a factor of ~2 up or down during the night

Individual exposure times of 600s were assumed for all cases.

Observations are assumed to be at f/32 and dithered (target object in the field at all times); sky subtraction noise is included.

The ITC calculates the S/N in an aperture that maximizes S/N given the predicted image quality for the observing conditions and the requested wavelength.